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Home >> Mazda >> 2011 >> 6 s Touring Plus >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (On-Board Diagnostic [Engine Control System MZR 2.5]) >> DTC P2502:00 >> Diagnostic procedure

Diagnostic procedure

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DIAGNOSTIC PROCEDURE CHART

STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
2 INSPECT FUSE 
  • Switch the ignition to off.
  • Disconnect the negative battery cable.
  • Remove the MAIN 125 A fuse.
  • Inspect the fuse.
  • Is there any malfunction?
 Yes If the MAIN 125 A fuse is melt:
  • Repair or replace for short to ground circuit before replace the MAIN 125 A fuse.

Go to Step 7.
No Go to the next step.
3 INSPECT BATTERY  Yes Recharge or replace the battery, then go to Step 7.
(See BATTERY RECHARGING .)
(See BATTERY REMOVAL/INSTALLATION .)
No Go to the next step.
4 INSPECT POOR INSTALLATION OF GENERATOR TERMINAL 
  • Inspect for looseness of generator terminal B installation nut.
  • Is the nut loose?
 Yes Tighten the generator terminal B installation nut, then go to Step 7.
No Go to the next step.
5 INSPECT GENERATOR  Yes Replace the generator, then go to Step 7.
(See GENERATOR REMOVAL/INSTALLATION .)
No Go to the next step.
6 INSPECT BATTERY CHARGING CIRCUIT FOR OPEN CIRCUIT 
  • Install the fuse.
  • Reconnect the disconnected connectors.
  • Reconnect the negative battery cable.
  • Measure the voltage between generator terminal B (wiring harness-side) and body ground.
  • Is the voltage B+  ?
 Yes Go to the next step.
No Repair or replace the wiring harness for a possible open circuit, then go to the next step.
7 VERIFY DTC TROUBLESHOOTING COMPLETED 
  • Make sure to reconnect ail disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS.

    (See AFTER REPAIR PROCEDURE .)

  • Perform the KOER self test.

    (See KOEO/KOER SELF TEST .)

  • Is the same DTC present?
 Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection. (See DTC TABLE .)
No DTC troubleshooting completed.
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